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X-ray fluorescence spectrum analysis method for contents of MgO and SiO2 in caustic calcined magnesite and brucite

A technology of fluorescence spectroscopy and light-burning magnesium, which is applied in the field of X-ray fluorescence spectroscopy, can solve problems such as increasing analysis steps, and achieve the effects of saving analysis time, saving analysis cost, and having fewer varieties.

Active Publication Date: 2020-10-30
NANJING IRON & STEEL CO LTD
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Problems solved by technology

Wherein MgO acceptance if adopt EDTA complexometric titration method, the result of analysis is the combined amount of CaO and MgO, therefore, this method must analyze CaO content, deduct and just can obtain the analysis value of MgO again, this has increased analysis step; If adopt Although the CyTA complexometric titration method does not need to analyze the CaO content, it uses hexamethylenetetramine, a reagent that is prone to explosion control.

Method used

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  • X-ray fluorescence spectrum analysis method for contents of MgO and SiO2 in caustic calcined magnesite and brucite
  • X-ray fluorescence spectrum analysis method for contents of MgO and SiO2 in caustic calcined magnesite and brucite
  • X-ray fluorescence spectrum analysis method for contents of MgO and SiO2 in caustic calcined magnesite and brucite

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Embodiment 1

[0021] This embodiment provides a kind of MgO, SiO in light burnt magnesia, magnesite 2 The X-ray fluorescence spectroscopic analysis method of content specifically comprises the following steps:

[0022] (1). Establish a standard curve and prepare a standard sample. The specific preparation steps of the standard sample are: according to the weight in Table 1, take the standard magnesium oxide and standard Silica, the two are mixed with a certain amount of mixed flux, the mixed flux is shown in Table 1, the surface is completely covered with 4g of mixed flux, 400g / L lithium bromide 1mL is added, melted in a melting furnace, and melted into a standard The sample piece is analyzed by X-ray fluorescence spectrometer, and the light intensity-content curve is drawn according to the element content in Table 1, and the MgO analysis curve is shown in figure 1 , SiO 2 Analysis curve see figure 2 ;

[0023] (2). Determine the particle size of the light analysis sample, the particle...

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Abstract

The invention discloses an X-ray fluorescence spectrum analysis method for contents of MgO and SiO2 in caustic calcined magnesite and brucite. The X-ray fluorescence spectrum analysis method specifically comprises the following steps: 1, establishing a standard curve and preparing a standard sample; 2, determining the granularity of an analysis sample; 3, drying the analysis sample in a drying oven; 4, weighing 1g of the analysis sample, and firing in a muffle furnace; 5, transferring the fired analysis sample into a platinum crucible filled with a mixed flux, uniformly stirring, covering thesurface with the mixed flux, and dropwise adding a release agent; 6, putting the analysis sample into a Claisse M4 type sample melting furnace for melting; according to the invention, the analysis time is saved; and the analysis result of the sample meets the precision requirement in related national chemical analysis standards.

Description

technical field [0001] The invention relates to MgO and SiO in light burnt magnesia and magnesite 2 content by X-ray fluorescence spectroscopy. Background technique [0002] At present, the quality inspection of light-burned magnesite, magnesite and brucite in most steel plants adopts "GB / T 5069-2015 Chemical Analysis Methods for Magnesium-Aluminum Refractory Materials". Wherein MgO acceptance if adopt EDTA complexometric titration method, the result of analysis is the combined amount of CaO and MgO, therefore, this method must analyze CaO content, deduct and just can obtain the analysis value of MgO again, this has increased analysis step; If adopt Although the CyTA complexometric titration method does not need to analyze the CaO content, it uses hexamethylenetetramine, a reagent that is subject to explosive control. Of which SiO 2 Molybdenum blue photometry is often used, and a large number of chemical reagents are also used in the analysis process. Although the chemic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/223G01N23/2202
CPCG01N23/223G01N23/2202G01N2223/076G01N2223/1016
Inventor 叶晓晴吴子红赵宁肖师杰
Owner NANJING IRON & STEEL CO LTD
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